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Method for preparing titanium-based polyester filaments by direct spinning of multi-kettle melt

A technology of melt direct spinning and polyester filament, applied in the field of polyester fiber, can solve the problems of poor catalyst dispersibility and achieve the effects of avoiding agglomeration, good compatibility and high dispersibility

Pending Publication Date: 2020-05-01
上海慧翌新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for preparing polyester filaments by direct spinning of multi-pot melts in order to overcome the defects of poor catalyst dispersion and the addition of catalysts only in the polycondensation stage in the above-mentioned prior art

Method used

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  • Method for preparing titanium-based polyester filaments by direct spinning of multi-kettle melt
  • Method for preparing titanium-based polyester filaments by direct spinning of multi-kettle melt
  • Method for preparing titanium-based polyester filaments by direct spinning of multi-kettle melt

Examples

Experimental program
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Effect test

Embodiment 1

[0078] A method for preparing a sheet-like titanium-based polyester catalyst. After mixing terephthalic acid, ethylene glycol, and n-butyl titanate at a molar ratio of 1:1.5:0.01, the temperature is 150°C and the pressure is 0.01MPa. After reacting for 0.5h under the same conditions, the temperature was raised to 200°C and the reaction was continued until the degree of esterification reached 70%. The reaction was terminated, filtered while hot, and then pulverized and ground to obtain a sheet-shaped titanium-based polyester catalyst with an average particle size of 0.5 μm.

Embodiment 2～6

[0080] A preparation method of a sheet-shaped titanium-based polyester catalyst, after mixing BT, CT and DT with a molar ratio of AT, reacting GT at a temperature of ET and a pressure of FT, then raising the temperature to HT to continue the reaction until esterification When the degree reaches IT, the reaction is terminated, filtered while hot, and then pulverized and ground to obtain a sheet-shaped titanium-based polyester catalyst with an average particle size of JT.

[0081]

Embodiment 7

[0083] A preparation method of a polyester titanium catalyst composite material system, firstly adding a mass concentration of 30wt% The ethylene glycol dispersion of the flaky titanium-based polyester catalyst, and then uniformly stirred and cooled to obtain a polyester titanium-based catalyst composite material system, wherein the flaky titanium-based polyester catalyst is prepared by Example 1, polyester The mass content of the sheet-shaped titanium-based polyester catalyst in the titanium-based catalyst composite material system body is 20 wt%.

[0084] Disperse 0.1g polyester titanium catalyst composite material system in 30mL water, heat and stir at 70°C for 3h, wash and dry the residual solid with absolute ethanol, and then perform FTIR characterization of the sample, as shown in figure 1 As can be seen from the figure, the polyester titanium series catalyst composite system sample in the present invention does not have much change in the crystal structure and character...

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Abstract

The invention relates to a method for preparing titanium-based polyester filaments by direct spinning of four-kettle melt. The preparation method comprises the following steps of preparing polyester melt by taking PTA, EG and a polyester titanium catalyst composite material system as raw materials and adopting a four-kettle polymerization process, and then performing melt direct spinning to prepare titanium-based polyester filaments; and adding the PTA, the EG and the polyester titanium catalyst composite material system into an esterification kettle 1 jointly, wherein the polyester titanium catalyst composite material system mainly comprises a polyester prepolymer with the polymerization degree of 5 -30 and a sheet-shaped titanium polyester catalyst dispersed in the polyester prepolymer.According to the method for preparing the polyester filaments by direct spinning of the four-kettle melt, the catalyst is wrapped with the polyester prepolymer with the polymerization degree of 5 -30,so that agglomeration is effectively avoided; the adopted catalyst has excellent hydrolysis resistance and can be added in any stage of esterification and pre-polycondensation; and the method for preparing the titanium-based polyester filaments by direct spinning of the four-kettle melt has the advantages of simple process, low cost and good application prospect.

Description

technical field [0001] The invention belongs to the technical field of polyester fibers and relates to a method for preparing titanium-based polyester filaments by multi-pot melt direct spinning. Background technique [0002] Polyester filament is made of polyester filament. Polyester is an important variety of synthetic fibers and is the trade name of polyester fibers in my country. Polyester has a wide range of uses and is widely used in the manufacture of clothing and industrial products. Flame-retardant polyester has a wide range of applications due to its flame retardancy. In addition to pure flame-retardant polyester, we can produce flame-retardant, waterproof, oil-repellent, antistatic and other multi-functional series products according to the special requirements of users. [0003] During the industrial synthesis of PET polyester, more than 95% of heavy metal antimony-based catalysts are used, and the polyester contains at least 200-450ppm. The annual consumption...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84D01D5/08C08G63/85C08G63/183C08G63/181C08G63/688C08G63/78
CPCD01F6/84D01D5/08C08G63/85C08G63/183C08G63/181C08G63/6886C08G63/785
Inventor 孙正清孙小国孙宾
Owner 上海慧翌新材料科技有限公司
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